FEIREFIZ:
In the German Arthurian epic poem, Parzival, Sir
Percival has a mulatto half-brother, Feirefiz, meaning
"black and white son," whom he meets near the
end of the poem. During a fight with Feirefiz, Percival's sword breaks, but
Feirefiz does not slay him. As they
are talking, they learn that they both have the same father.

FENRIR:
Usually said to be an Anglicized form of Old Norse Fenrisúlfr,
but according to Sophus Bugge, author of The Home of
The Eddic Poems, this name, as well as Fenris,
probably originated with
Norsemen under the influence of Christianity, and was a word for "hell" and only later
took on the meaning "swamp."

FENRIS:
Usually said to be an Anglicized form of Old Norse Fenrisúlfr,
but according to Sophus Bugge, author of The Home of
The Eddic Poems, this name, as well as Fenrir,
probably originated with
Norsemen under the influence of Christianity, and was a word for "hell" and only
later took on the meaning "swamp."

FENRISÚLFR:
In
mythology, this is the name of a wolf, the son of Loki
and the giantess Angrboða,
popularly translated "swamp wolf," but probably
originally meaning "wolf of hell." According to
Sophus Bugge, author of The Home of The Eddic Poems,
this name cannot possibly mean "swamp wolf," for there does not
exist in Old Norse any derivative endings as -rir, or -ris.
He believes Fenrir and Fenris arose under
the influence of Christian conceptions of the devil as lupus
infernus, combined with tales of the Behemoth and
the beast of the Apocalypse, and was altered in form in
accordance with popular Old Norse etymology. He compares
Old Norse fern from Latin infernus to Old
Saxon fern which was derived from Latin infernum,
and explains that Fenrir and Fenris must
have been formed from *Fernir from fern using
the endings -ir and gen. -is, both of which were very
much used in mythical names, including names of giants.
He goes on to explain that the later connection with fen
("fen, swamp, mire") was natural, for hell and
lower regions, such as the abyss, are often connected by
imagination just as they still are today.

FENRISÚLFUR: Icelandic
form of Old Norse Fenrisúlfr,
popularly translated "swamp wolf," but probably
originally meaning "wolf of hell."

FENTON:
English surname transferred to forename use,
composed of the Old English elements fenn "fen, marsh" and tun
"enclosure, settlement," hence "marsh settlement."